/Engine/Plugins/Enterprise/DatasmithImporter/Source/DatasmithImporter/Public/DatasmithImportContext.h
First part of the Init process, replaces Init, requires a call to SetupDestination and InitScene after that. Displays the options to the end-user (blocking call), and updates translator accordingly. When silent, Json options are parsed instead.
false if the user canceled -> import should not occurs in that case.
bool InitOptions ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IDatasmithScene](API\Runtime\DatasmithCore\IDatasmithScene) > InScene, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FJsonObject](API\Runtime\Json\Dom\FJsonObject) > & ImportSettingsJson, bool bSilent )